From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1 11/15] powerpc/kuap: Wire-up KUAP on 44x
Date: Wed, 6 Oct 2021 14:43:44 +0200 [thread overview]
Message-ID: <6f7dfafe22d5d681135c7e66a39d860d3963b862.1633523837.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1633523837.git.christophe.leroy@csgroup.eu>
This adds KUAP support to 44x. This is done by checking
the content of SPRN_PID at the time it is read and written
into SPRN_MMUCR.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/kernel/head_44x.S | 16 ++++++++++++++++
arch/powerpc/platforms/Kconfig.cputype | 1 +
2 files changed, 17 insertions(+)
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 02d2928d1e01..cf92a3434acd 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -334,6 +334,10 @@ interrupt_base:
mfspr r12,SPRN_MMUCR
mfspr r13,SPRN_PID /* Get PID */
rlwimi r12,r13,0,24,31 /* Set TID */
+#ifdef CONFIG_PPC_KUAP
+ cmpwi r13,0
+ beq 2f /* KUAP Fault */
+#endif
4:
mtspr SPRN_MMUCR,r12
@@ -444,6 +448,10 @@ interrupt_base:
mfspr r12,SPRN_MMUCR
mfspr r13,SPRN_PID /* Get PID */
rlwimi r12,r13,0,24,31 /* Set TID */
+#ifdef CONFIG_PPC_KUAP
+ cmpwi r13,0
+ beq 2f /* KUAP Fault */
+#endif
4:
mtspr SPRN_MMUCR,r12
@@ -575,6 +583,10 @@ finish_tlb_load_44x:
3: mfspr r11,SPRN_SPRG3
lwz r11,PGDIR(r11)
mfspr r12,SPRN_PID /* Get PID */
+#ifdef CONFIG_PPC_KUAP
+ cmpwi r12,0
+ beq 2f /* KUAP Fault */
+#endif
4: mtspr SPRN_MMUCR,r12 /* Set MMUCR */
/* Mask of required permission bits. Note that while we
@@ -672,6 +684,10 @@ finish_tlb_load_44x:
3: mfspr r11,SPRN_SPRG_THREAD
lwz r11,PGDIR(r11)
mfspr r12,SPRN_PID /* Get PID */
+#ifdef CONFIG_PPC_KUAP
+ cmpwi r12,0
+ beq 2f /* KUAP Fault */
+#endif
4: mtspr SPRN_MMUCR,r12 /* Set MMUCR */
/* Make up the required permissions */
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index dce1cf31047b..74e5887abbce 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -62,6 +62,7 @@ config 44x
select HAVE_PCI
select PHYS_64BIT
select PPC_HAVE_KUEP
+ select PPC_HAVE_KUAP
endchoice
--
2.31.1
next prev parent reply other threads:[~2021-10-06 12:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 12:43 [PATCH v1 00/15] powerpc: Add KUAP support for BOOKE and 40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 01/15] powerpc/32s: Do kuep_lock() and kuep_unlock() in assembly Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 02/15] powerpc/32s: Save content of sr0 to avoid 'mfsr' Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 03/15] powerpc/kuap: Add a generic intermediate layer Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 04/15] powerpc/kuap: Check KUAP activation in generic functions Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 05/15] powerpc/kuap: Remove __kuap_assert_locked() Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 06/15] powerpc/kuap: Add kuap_lock() Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 07/15] powerpc/nohash: Move setup_kuap out of 8xx.c Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 08/15] powerpc/config: Add CONFIG_BOOKE_OR_40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 09/15] powerpc/kuap: Prepare for supporting KUAP on BOOK3E/64 Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 10/15] powerpc: Add KUAP support for BOOKE and 40x Christophe Leroy
2021-10-06 12:43 ` Christophe Leroy [this message]
2021-10-06 12:43 ` [PATCH v1 12/15] powerpc/kuap: Wire-up KUAP on 40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 13/15] powerpc/kuap: Wire-up KUAP on 85xx in 32 bits mode Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 14/15] powerpc/kuap: Wire-up KUAP on book3e/64 Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 15/15] powerpc: Remove CONFIG_PPC_HAVE_KUAP Christophe Leroy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6f7dfafe22d5d681135c7e66a39d860d3963b862.1633523837.git.christophe.leroy@csgroup.eu \
--to=christophe.leroy@csgroup.eu \
--cc=benh@kernel.crashing.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).